Date Added: Dec 2012
In wireless sensor networks with single sink node, the energy consumption of sensors near the sink or on the critical paths is too fast besides other disadvantages. Therefore, the authors propose an Energy-efficient Multi-sink Clustering Algorithm (EMCA) for wireless sensor networks. In EMCA, residual energy plays a significant role in the procedure of selecting cluster heads. They also design an inter-cluster and intra-cluster routing algorithm aiming at minimizing the energy consumption. Inside a cluster, a multi-hop way is under consideration for a node to relay data instead of direct transmission. Simulation results show that their proposed algorithm consumes much less energy and owns longer network lifetime than the traditional routing algorithm LEACH.